Two officers from the Huntington Park Police Department in Los Angeles County on Thursday fatally shot Anthony Lowe, a Black double amputee who was moving away from them without his wheelchair.

Huntington Police told CNN that officers were responding to reports of a stabbing and found a victim with a life-threatening stab wound when they encountered Lowe, 36.

The stabbing victim reportedly described the attacker as a wheelchair-bound Black man who dismounted and ran to the victim without provocation, and stabbed him in the side of the chest with a 12 butcher knife.

Authorities claimed that Lowe was found within blocks of the victim with a knife on his person. They alleged that he ignored commands to drop the knife and threatened to throw it, and that they tried but failed to subdue him using Tasers.

The two officers fired about 10 rounds at Lowe, a police spokesperson told The Los Angeles Times . Lowe was struck in the upper torso and pronounced dead on the scene.

Cellphone footage shows a man on a sidewalk next to a wheelchair when the officers go toward him; he attempts to move away without the wheelchair.

Im heartbroken, and filled with anger and rage, Lowes sister Tatiana Jackson told The Guardian . I just cant understand why they would do that to someone in a wheelchair. I want somebody to explain to me what was the reason that you had to gun down a guy who has no legs.

Lowes death has spurred local demonstrations by activists against police brutality. His family is calling for the officers to be fired and face murder charges.

They murdered my son, in a wheelchair with no legs, his mother, Dorothy Lowe, said outside the Huntington Park Police Department on Monday, per CBS News . They do need to do something about it.